Pneumatic pump



June 30, 1925. 1,544,347

H. s. ROGERS PNEUMATIC PUMP Filed Fen/11, 1920 o, 1 l l/s |`\\\\\\\\\\\\\\\\\\\\\\\\\s\s N 3 u v fftetorf f3 Mm Mm @MKM Patented June 30, 1925.

UNITED STATES' PATENT orti-es..

Hoi/IER s. ROGERS, or MILWAUKEE, Wseonsrn, assiettes, BY ran-sive assefnrfrmvas,

To MILWAUKEE AIR Powe-12J PUMP COMPANY, or iarnwaniiim, wseoivsriv, A Cen- PORATION OF W'ISCONSIN.y

NEUMATIC PUMP.

Application med February 11, i920. serial iialssi'msaf 10 all Iwhom/ may cmwern.'

Be it known that I, Hoarau S. RoenRs, a citizen ot' the United States, residing at Mill waukee. iu the county ot li'lilv'aukee and State et li'isconsin, have inver. .d esta@ new and useful lniprovements in Pneumatic Pumps, ot which the 'tollowing vis a vspeeltication, reference being had to theaccompanying drawing, forming a part theres-lf.

This invention relates to pneiunatie pumps, and the object ot the invention is to improve. tlheconstruction and operation ot pneumatic pumps in the manner to be hereina'lter described and claimed.

Reterring to the drawingv4 which 4aecompanies this specitication and terms a part hereot, which drawing illustrates an embodiment of this invention, the figure ot' the drawing is a vertical Section ot a pneumatic pump.

Referring to the drawing, the reference numeral 1 designates a casing partly forming two pump chau'il'iei's 2 and 3. The pump chambers are provided with water inlet valves 4 and 5 and water outlet pipes 6 and 7 and the water outlet pipes are provided with outwardly opening check valves 8 and 9. The pump chambers are also provided with air inlet ports 1() and 11, air inlet valves 12 and 13, air exhaust ports 14 and 15, and air exhaust valves 16 and 17. The air exhaust ports 14 and 15 are illustrated by the drawing as communicating with a main or common exhaust port 18 with wfhich an exhaust pipe, not shown, can be connected to extend above the surface of the water in an ordinary manner. The air exhaust valves 16 and 17 are interconnected so that one is closed as the other is opened. VThe drawing illustrates a simple method of interconnecting these valves, their stems 19 and 20 being connected with a lever 21 which is pivot-ed on a pivot 22, the pivot 22 being supported by the top or cover 23 which closes the top ot the casing 1 and completes the pump chambers 2 and 3. The air inlet valves 12 and 13 are carried by pivoted levers 24 and 25 which are provided with weights 26 and 27 heavy enough to close the air inlet valves and keep them closed against the pressure ot the compressed air in the air inlet ports. The weights 26 and 27 are connected with the air exhaust valves 16 and 17 so that they will be lifted when the air exhaust valves Yare closed, so as to open the Vair inlet valves 12 and 13. The connection is' preferably a loose one such, vtor example,as that illustrate'd by the drawings 1in which pins 26 and 2E) engage in slots in lugs 30 and 31 secured to the air exhaust valves. The air exhaust ports 14 and 15 and the air exhaust valves lland 17 are made'ot suttieiently large areas Vso 4that the air exhaust valves will be held to' seats, even while supporting the hts 26 and 27, by the fditl'erence between the pressures within the pump chambers and outside thereof, so that an air'exhaust valve will not be opened until the water level in its pump chamber has receded to a predetermined low water level.A The reference numerals 32 Aand 33 vdesignate Vmotors ot suiiicientpower `to torce the' air exhaust valves 16 and 17 from theirseats 34 and 'llhe motors 32 and 33 'are .illustrated by ther drawing as eta fluid-pressure type and include `flexible diaphragms`36 and 37 of suliicient area to yield the power required. The spaces 38 and 39` between the diaphragms 36 and 37 and the heads 40 and 41 canv be placed in communication with the pump 'chambers 2 and `3 througlrthe 'pipes 42 and 43, respectively'. Valves 44 and 45 establish communication between the pump chambers and the motors 32 and 33, or prevent communication between the pump chambers and the motors, according to the water levels in the pump chambers, these valves being operated by floats' 46 and 47.

Compressed air is conveyed to the air inlet ports 10 and 11 from any suitable source ot supply by the compressed air pipe 48. spring 49 is provided as ame-ans for preventing the air exhaust valves from assuming impositive positions while t'he pump is being transported or installed, tor example, butexerts no other function in the pump construction or in the operation ot the pump under normal conditions of operation. lVhile this spring is strong enough to litt the weight 26, it is weak enough to be readily compressed by the motor 32 when Aclosing the air exhaustV valve 17 and lifting the weight 27.

Bleed holes 50 and 51 are provided for the escape of air from the motors' 32 and 33 to prevent their becoming air bound as some air will escape from the water which is utilized as the fluid-pressure medium for trans# mitting thepressureof the compressed air' from a pump chamber tothe diaphragm of y a motor.

The. operation of the *pump willfbe H readily understood `from 'anfinspeetio-n of the' drawing. The drawing illustrates the parts in the positions which they occupy immediately after the air exhaust valve F17 has been opened and the air exhaust valve 16 has been closed,V with' the vair inletvalve 13 Vclosed andthe air inlet valve 12 open. YTater is; flowing intothe pump chamber 3 and 'has opened Ithe water inlet vulve 5,but the 'water level Vhas not risen 'sufficiently high t'o' raise ythe float 47 and closefthe'valvef45.

' v'level inthe pump chamber 3 andthe' exhaust pipe, not'l shown, hasneurly yreached the `1evel of Ithe water in which vthe 'pump v is submerged. It' the water in the' pump chamber 2 is permitted to' escape through thek pipe, the waterv level in the pump chamber will be vlowered until it is below- `the line of flotation ot thef'loat 4G, Vasfthe valve 44 VVisheld closed by the differencebetween the pressures in thepump chamber Vand outside thereof. WVhenthe water level has lowered 46 overcomes the pressure keeping the valve n 44 closedthe `valve 44 will be opened su'dden- Y 'lyand water jrB2 sind'forceA will be forced into the 'motoria the a.ir'exl1au`st valvesl from` pipe, an air its i seat* and' close the "lair" exhaust i valve 17.

vWhen f the "air fexhaustfyalve 16 is forced 'from its seat, theweight 26 can dropV and' close the f air inlet valve A 12, and when l the air Vexhaustlvalveg17 is closed.l the weight 27 will be lifte'dandthe"airrinlet valve 15 opened. T herpump chamber 2 will now lill with water and the water canbe'orced out f of the pump chamber 3 through the Vpipe 7. "-Vht is-claimedis: f` f 1. A pneumatic pump comprisingl a plu- Vohembers "each provided a` water 4outlet pipe5 an air ijnletfvalveyandan' air'` exhaust valve,V weights suspended from saidexhaust valves,

rality of pump vwith' af water vinlet'valve a link connecting the air inlet 'vulve 'eind weight of each chamber,fandfineans connecting the exhaust valves of saidchamb'ers to insure a reverse condition Vof the air'ivalves in said chambers. p V- .y 2. A: pneumatic; pump comprising a plulrality 'of pump chambersfeach provided withv alwutei inlet valve, 'mwater outlet vulve, weights Connected to and ing the air .inlet,valveand'weight of Leach inlet "'Vilwvf'md "2111 air exhaust: i

fl'Om sind exhaust'valves, a Ylink .c'onnectchamber, `and means 'connecting the 'exhaust Y vulves of said ichan'ibers to insure .a'rev'erse condition or t'hej'air valves 1n' szu'd chambers,

the connections between said weights und" said exhaust vii-"Ives being suchy as to "permit elements.

signature.

enorme-*s lRoenes.

of 'slight fi'ndependent'"movement "of said suiciently so that the 'weightro'f thel'oat 'A 

